My new palmtop computer is very convenient.

My father is good at repairing microcomputers.

Your computer may be infected with spyware.

This software is shareware, so you need to pay a fee after the trial period.

This freeware is very convenient, and anyone can download it for free.

The infectious capacity of this virus is very strong.

The number of people infected with the new coronavirus is rapidly increasing.

A ping-pong infection occurred at school, causing many students to take time off.

Oral infection is when pathogens enter the body through food or drink.

Prevention of infectious diseases is important with hand washing and wearing masks.